it means...that you mean what you mean:)
1.not nice 2.rude and disrespectful to other people 3.opposite of nice 4.cruel 5.harsh through words or actions
it means average distance which equals the total of each distance divided by how many sets of numbers you previously added by.
Dollars cents drachmas euros and rubles are all monetary units.
It could mean that you are nervous that you will disappoint someone you respect or care about.